automobile traction control is very common now, but it does not increase the traction, but through a variety of different ways to manage the tire’s gripping ability during acceleration or braking. Way to stop the wheels from spinning. The acronym
TCS is ASR, and German is Antriebsschlupfregelung, which roughly translates to "drive slip control". This perfectly describes what it does, because only changing the tires, surface conditions or car weight can increase traction. How does
TCS work and what does it do?
In the traditional transmission system without limited slip differential (LSD), the role of the "open" differential is to allow the outer wheels to spin faster when the car is turning, while still transmitting torque to the two wheels. If a wheel loses grip, such as on a slippery road, the wheel will rotate, and no torque will be transmitted to the wheel with grip, and the driving force will be lost.
At this time, whether it is TCS or something else, the boundary becomes very blurred. The original traction control was a mechanical, clutch-type LSD, which included a common gear set plus a clutch set. When one wheel rotates, a mechanism gradually compresses the clutch plates, steadily locks the two wheels together, and restores the driving force to the wheel with the greatest grip. Because it is mechanical, the clutch-based LSD can do other things. For example, on a rear-wheel drive car, if it is set aggressively, it can promote oversteer and affect handling.
On road vehicles, engineers need to be able to control the wheel rotation without affecting the control balance. This is equally important for front-wheel drive and rear-wheel drive. When front-wheel-drive cars begin to gain huge power and torque, another method of controlling wheel rotation without LSD becomes more urgent.
's earliest electronic TCS (still in use) used brakes with an open differential and an ABS system to prevent one wheel from spinning. The signal from the ABS wheel speed sensor tells the system that one drive wheel rotates faster than the other drive wheel, and it intervenes by adjusting the brake of the rotating wheel to reduce engine torque if necessary.
This can be achieved in the engine management software by slightly delaying the ignition, or using the electronic line-by-line throttle, just retreat a little later. The use of the brakes is quite gentle to control the rotation of the wheels, but not so aggressive as to make the car turn. This is the function of the stability control system. Other technologies that can accomplish similar tasks include electronic differentials and torque vectoring systems, which can distribute torque to one or another wheel.
Michelin said its new e.Primacy tires can save 0.21 liters of fuel per 60 miles. This is due in part to the structure and materials of the tire, which makes the tire more elastic. When the tire is rolling, the bottom will be squeezed and recover its shape in a continuous process.
When the tire shape is restored, it consumes less energy than it absorbs (lagging), and the remaining energy is wasted in the form of heat. The greater the elasticity of the tire, the smaller the impact.
This article comes from the author of Autohome and does not represent the viewpoint of Autohome.
